<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
</body>
<script>
   var intNum = 100;
   var doubleNum = 3.1415926;
//    var notNum = NAN;
   console.log(typeof intNum);
   console.log( typeof doubleNum);
//    console.log( typeof notNum);
   var emptyStr = "";
   var str ="HEllo World";
   console.log(typeof str);
   var boolean1 = true;
   console.log(typeof boolean1);

   var
</script>
</html>